Precise Measurement of the Size of Nanoparticles by Dynamic Light Scattering with Uncertainty Analysis
- 18 March 2008
- journal article
- research article
- Published by Wiley in Particle & Particle Systems Characterization
- Vol. 25 (1), 31-38
- https://doi.org/10.1002/ppsc.200700015
Abstract
Dynamic light scattering (DLS) is a powerful technique for the sizing of nanoparticles and characterization of their properties in the liquid phase. However, the precision of this technique remains unclear and therefore, in the current work, the precision of the DLS technique for sizing polystyrene latex suspensions and the uncertainty of the DLS data are estimated. Precise measurements of the short time correlation function at seven scattering angles and five different concentrations are performed for four kinds of polystyrene latex suspensions with diameters of 30–100 nm. The extrapolations of apparent diffusion coefficients to infinite dilution and to lower angles yield more precise values than those obtained at one angle and one concentration. The extrapolated particle size measured by DLS is compared to the size determined by a differential mobility analyzer (DMA) in air. Before the comparison, the intensity‐averaged size measured by DLS is recalculated to the number‐averaged size in the case of DMA from the particle size distribution. After the recalculation, consistent values of mean particle diameter are found to be between those obtained by DLS and DMA within the estimated uncertainties.Keywords
This publication has 7 references indexed in Scilit:
- Determination of Arbitrary Moments of Aerosol Size Distributions from Measurements with a Differential Mobility AnalyzerAerosol Science and Technology, 2000
- CODATA recommended values of the fundamental physical constants: 1998Reviews of Modern Physics, 2000
- Dynamic Light ScatteringPublished by Oxford University Press (OUP) ,1993
- LIGHT SCATTERING THEORYPublished by Elsevier BV ,1991
- Dynamic light scattering from semidilute cellulose-tri-carbanilate solutionsPolymer, 1986
- Simultaneous static and dynamic light scatteringMacromolecules, 1982
- Recommended Reference Materials for Realization of Physicochemical PropertiesPublished by Walter de Gruyter GmbH ,1980